net: ipv6: unexport __init-annotated seg6_hmac_init()

{
  "id": "567a085195eaff83c185e1a9b9c3f1477ef032d914ab010e656f92f0cb45c3f3",
  "url": "https://osv.dev/vulnerability/CVE-2022-49339",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: ipv6: unexport __init-annotated seg6_hmac_init()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: ipv6: unexport __init-annotated seg6_hmac_init() EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic. modpost used to detect it, but it has been broken for a decade. Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds. There are two ways to fix it: - Remove __init - Remove EXPORT_SYMBOL I chose the latter for this case because the caller (net/ipv6/seg6.c) and the callee (net/ipv6/seg6_hmac.c) belong to the same module. It seems an internal function call in ipv6.ko.",
    "evidence": "osv:CVE-2022-49339",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.14.283",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "4.19.247",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.4.198",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.122",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.47",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.17.15",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.18.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-49339",
      "aliases": [
        "CVE-2022-49339"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "bf355b8d2c30a289232042cacc1cfaea4923936c"
                },
                {
                  "fixed": "64aef8efe96c1616142c4476a05731306fc4494e"
                },
                {
                  "fixed": "ab8b2c2de273ec1d698a18e399896a6febb5cda0"
                },
                {
                  "fixed": "317260b3eb6384a05a8af212308fa50f3b2e8290"
                },
                {
                  "fixed": "5d9c1b081ad28c852a97e10dd75412546497694a"
                },
                {
                  "fixed": "1084716f76c8045eadf92a9d9a62641f3c8d8c90"
                },
                {
                  "fixed": "3e6de5037148c5a93a436b1e8d2edad3dac11755"
                },
                {
                  "fixed": "9ba4416b831eeb4d185e88e73488d1d21288e63a"
                },
                {
                  "fixed": "5801f064e35181c71857a80ff18af4dbec3c5f5c"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49339.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.10.0"
                },
                {
                  "fixed": "4.14.283"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.15.0"
                },
                {
                  "fixed": "4.19.247"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.20.0"
                },
                {
                  "fixed": "5.4.198"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.122"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.47"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.17.15"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.18.0"
                },
                {
                  "fixed": "5.18.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49339.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.822798180Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1084716f76c8045eadf92a9d9a62641f3c8d8c90",
        "https://git.kernel.org/stable/c/317260b3eb6384a05a8af212308fa50f3b2e8290",
        "https://git.kernel.org/stable/c/3e6de5037148c5a93a436b1e8d2edad3dac11755",
        "https://git.kernel.org/stable/c/5801f064e35181c71857a80ff18af4dbec3c5f5c",
        "https://git.kernel.org/stable/c/5d9c1b081ad28c852a97e10dd75412546497694a",
        "https://git.kernel.org/stable/c/64aef8efe96c1616142c4476a05731306fc4494e",
        "https://git.kernel.org/stable/c/9ba4416b831eeb4d185e88e73488d1d21288e63a",
        "https://git.kernel.org/stable/c/ab8b2c2de273ec1d698a18e399896a6febb5cda0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49339.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49339",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49339.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49339",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 491319,
  "published_at": "2025-02-26T02:10:56.704+00:00"
}